Zhè / wèi / xué / zhě / cháng / qī / zuān / yán / gǔ / dài / wén / xiàn / duì / xiāng / guān / wèn / tí / jí / shēn / yán / jǐ

这位学者长期钻研古代文献，对相关问题极深研几。

This scholar has studied ancient texts for years and investigated the relevant issues in great depth.